CN103346572A - Reactive intelligent control method for power grid based on sensitivity and multiple Agents - Google Patents
Reactive intelligent control method for power grid based on sensitivity and multiple Agents Download PDFInfo
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- CN103346572A CN103346572A CN2013103231431A CN201310323143A CN103346572A CN 103346572 A CN103346572 A CN 103346572A CN 2013103231431 A CN2013103231431 A CN 2013103231431A CN 201310323143 A CN201310323143 A CN 201310323143A CN 103346572 A CN103346572 A CN 103346572A
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Abstract
The invention discloses a reactive intelligent control method for a power grid based on sensitivity and multiple Agents in the technical field of reactive voltage control of the power grid. The method comprises the following steps of: dividing transformer substations in the power grid into three levels according to the size of busbar voltages; dividing the power grid into multiple regions which do not intersected with one another, and dividing each region into multiple areas which are not intersected with one another; setting a region-level Agent for each region, and setting an area-level Agent for each area; respectively calculating region power grid voltage/reactive sensitivity matrixes and area power grid voltage/reactive sensitivity matrixes for the region-level Agents and the area-level Agents according to basic data collected by a dispatching center; carrying out region reactive voltage control on the region-class Agents according to the region power grid voltage/reactive sensitivity matrixes; and carrying out area reactive voltage control on the area-class Agents according to the area power grid voltage/reactive sensitivity matrixes. According to the reactive intelligent control method, the defect of large calculated amount in the conventional method is overcome by utilizing a sensitivity linear calculation method.
Description
Technical field
The invention belongs to electric network reactive-load voltage control technical field, relate in particular to a kind of electric network reactive-load intelligence control method based on sensitivity and multi-Agent.
Background technology
In the last few years, worldwide, especially in developed country, some occur because accident initiation transmission line is out of service in succession, dropped to the pernicious power outage of notable feature with important load node voltage avalanche type significantly.These serious accidents, often all closely related with the voltage stable problem.Therefore, the Based Intelligent Control to big electric network reactive-load seems particularly important.
The voltage unstability is considered to cause the one of the main reasons of the dangerous operation of electrical network.Traditional voltage control is divided into three levels: primary voltage control, secondary voltage control and tertiary voltage control.The SVC(Static Var Compensator of this hierarchical control mode, the static reactive power compensation device) can increase the system voltage stability margin, postpone the generation of voltage collapse, take further step thereby leave the sufficient time for the traffic control personnel of system.Yet, when system is in a state of emergency, SVC can not guarantee to stop voltage collapse, and the emergency control research method that is decided to be scene with long-term voltage instability exists certain defective, mainly show: for the electric power system that has the internal connection behavioral characteristics on a large scale, the complexity of its system model and non-linear cause the stable research method of existing power system voltage generally exist computing time long, amount of calculation is excessive, the problem that is difficult to use in practice; Compensation equipment/system disperses, and interregional shortage is coordinated Ji mutually, and device resource can not obtain optimal utilization; Along with the increase of electric power system node number, dimension disaster usually can occur and cause system equation not have the phenomenon of solution.Especially concentrate under the situation about being incorporated into the power networks in the large-scale wind power field, electric network reactive-load consumption, voltage fluctuation situation more are tending towards obviously, and this reactive power to system is had higher requirement.How to optimize and utilize the existing reactive power compensator that disperses, solve the regional idle imbalance that wind-electricity integration brings quickly and accurately, the voltage destabilization problems is the task of top priority of power network safety operation even.Therefore, need research and propose a kind of big electric network reactive-load intelligence control method based on sensitivity and multi-Agent.
Summary of the invention
The objective of the invention is to, propose a kind of electric network reactive-load Based Intelligent Control control method based on sensitivity and multi-Agent, be used for solving the deficiency that prior art exists when carrying out electric network reactive-load control.
To achieve these goals, the technical scheme of the present invention's proposition is that a kind of electric network reactive-load intelligence control method based on sensitivity and multi-Agent is characterized in that described method comprises:
Step 1: the transformer station in the electrical network is divided into Three Estate according to the size of busbar voltage, i.e. highest voltage level transformer station, inferior voltage levels transformer station and low-voltage grade transformer station;
Described highest voltage level transformer station is that substation bus bar voltage is more than or equal to the transformer station of first set point;
Described voltage levels transformer station is substation bus bar voltage less than first set point and more than or equal to the transformer station of second set point;
Described low-voltage grade transformer station is that substation bus bar voltage is less than the transformer station of second set point;
Step 2: electrical network is divided into several mutually disjoint zones, and described mutually disjoint zone refers to that the highest voltage level transformer station in each zone is different;
Each zone is divided into several mutually disjoint areas, and described mutually disjoint area refers to that inferior voltage levels transformer station and the low-voltage grade transformer station in each area is different;
Step 3: in grid dispatching center, for each zone arranges a region class Agent, for each area arranges a local level Agent, arrange one in addition and coordinate level Agent;
Described region class Agent is used for judging whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, and when the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, the adjustable reactive-load compensation equipment that adjustable reactive-load compensation equipment and time voltage levels transformer station of highest voltage level transformer station configuration in the zone disposes is carried out reactive power;
Described local level Agent is used for judging whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, and when the busbar voltage of time voltage levels transformer station is out-of-limit in the area, the adjustable reactive-load compensation equipment that adjustable reactive-load compensation equipment and the low-voltage grade transformer station of in the area voltage levels transformer station configuration disposes is carried out reactive power;
The described level Agent that coordinates is used for the out-of-limit information of voltage that receiving area level Agent sends, and asks to send electric out-of-limit information region class Agent in addition and carry out reactive power;
Step 4: the basic data that region class Agent and local level Agent gather according to the control centre, zoning line voltage/idle sensitivity matrix and area power grid voltage/idle sensitivity matrix respectively;
Step 5: local level Agent carries out regional reactive power according to the area power grid voltage/idle sensitivity matrix that calculates;
Step 6: region class Agent carries out regional reactive power according to the regional power grid voltage/idle sensitivity matrix that calculates.
Described regional reactive power comprises following substep:
Substep 101: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 102; Otherwise, carry out substep 115;
Substep 102: judge that whether the out-of-limit inferior voltage levels transformer station of busbar voltage has disposed adjustable reactive-load compensation equipment, if described voltage levels transformer station disposed adjustable reactive-load compensation equipment, then carries out substep 103; Otherwise carry out substep 105;
Substep 103: the adjustable reactive-load compensation equipment of regulating described voltage levels transformer station configuration;
Substep 104: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 105; Otherwise, carry out substep 115;
Substep 105: the region class Agent of local level Agent affiliated area judges whether the highest voltage level transformer station in the zone has disposed adjustable reactive-load compensation equipment, if described highest voltage level transformer station has disposed adjustable reactive-load compensation equipment, then carry out substep 106; Otherwise carry out substep 108;
Substep 106: the adjustable reactive-load compensation equipment of regulating the configuration of described highest voltage level transformer station;
Substep 107: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 108; Otherwise, carry out substep 115;
Substep 108: local level Agent is according to regional line voltage/idle sensitivity matrix, with the adjustable reactive-load compensation equipment of all low-voltage grade transformer stations configurations in the area according to the descending rank order of sensitivity;
Substep 109: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment of low-voltage grade transformer station configuration successively, in the area busbar voltage of inferior voltage levels transformer station not out-of-limit till;
Substep 110: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 111; Otherwise, carry out substep 115;
Substep 111: local level Agent sends to the out-of-limit information of voltage the region class Agent of local level Agent affiliated area, voltage/idle the sensitivity of the adjustable reactive-load compensation equipment of inferior voltage levels transformer station configuration in other areas in the region class Agent zoning beyond the described local level Agent location, and the adjustable reactive-load compensation equipment that the inferior voltage levels transformer station in other areas is disposed is according to voltage/descending order of idle sensitivity;
Substep 112: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment that inferior voltage levels transformer station in other areas disposes successively, till the busbar voltage of the inferior voltage levels transformer station in described local level Agent location is not out-of-limit;
Substep 113: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 114; Otherwise, carry out substep 115;
Substep 114: the reactive compensation capacity deficiency, calculate reactive compensation capacity to be configured according to regional line voltage/idle sensitivity matrix;
Substep 115: regional reactive power finishes.
Described regional reactive power comprises following substep:
Substep 201: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 202; Otherwise, carry out substep 212;
Substep 202: judge whether the out-of-limit highest voltage level transformer station of busbar voltage has disposed adjustable reactive-load compensation equipment, if described highest voltage level transformer station has disposed adjustable reactive-load compensation equipment, then carry out substep 203; Otherwise carry out substep 205;
Substep 203: the reactive power compensator of regulating highest voltage level transformer station;
Substep 204: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 205; Otherwise, carry out substep 212;
Substep 205: region class Agent is according to this regional power grid voltage/idle sensitivity matrix, with the adjustable reactive-load compensation equipment of all times voltage levels transformer stations configuration in the zone according to the descending rank order of sensitivity;
Substep 206: according to the order after the ordering, regulate time adjustable reactive-load compensation equipment of voltage levels transformer station configuration successively, in the zone busbar voltage of highest voltage level transformer station not out-of-limit till;
Substep 207: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 208; Otherwise, carry out substep 212;
Substep 208: region class Agent sends to other region classes Agent with the out-of-limit information of voltage by coordinating level Agent, other region classes Agent calculates the voltage/idle sensitivity of the adjustable reactive-load compensation equipment of the highest voltage level transformer station configuration in the zone separately, and with the adjustable reactive-load compensation equipment of the highest voltage level transformer stations configuration in other zones according to voltage/descending order of idle sensitivity;
Substep 209: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment of the highest voltage level transformer station configuration in other zones successively, till the busbar voltage of the highest voltage level transformer station in described region class Agent region is not out-of-limit;
Substep 210: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 211; Otherwise, carry out substep 212;
Substep 211: the reactive compensation capacity deficiency, calculate reactive compensation capacity to be configured according to regional power grid voltage/idle sensitivity matrix;
Substep 212: regional reactive power finishes.
The reactive power compensator of described adjusting highest voltage level transformer station/time voltage levels transformer station/low-voltage grade transformer station is specially:
Substep 301: adopt formula Δ Q=Δ U * S to calculate regulated quantity; Wherein, Δ Q is the reactive power regulated quantity of injecting, and Δ U is the out-of-limit value of busbar voltage, and S is that the affiliated highest voltage level transformer station/time voltage levels transformer station/low-voltage grade transformer station of reactive power compensator is to the REACTIVE POWER Sensitirity va1ue of out-of-limit bus;
Substep 302: regulate reactive power compensator according to regulated quantity.
Method provided by the invention is divided into a plurality of zones with big electrical network, and each zone is divided into a plurality of areas, and the highest voltage level busbar voltage in the zone is carried out the reactive voltage computational analysis by the region class Agent in the reactive voltage intelligence system, generates control strategy; Inferior voltage levels busbar voltage in the area is carried out the reactive voltage computational analysis by the local level Agent in the idle intelligence control system, generates control strategy.Big electrical network definition is become more than one Agent, coordinate control each other, and the autonomy that has by Agent itself, initiatively, reaction, intelligent characteristic such as mutual, according to voltage between node/idle sensitivity information, realize the voltage power-less Based Intelligent Control to whole system.This method can realize the decentralized coordinating control problem of voltage-regulation preferably, normal and in emergency circumstances can both obtain voltage/idle control effect preferably, has certain practicality.
Description of drawings
Fig. 1 is based on the electric network reactive-load intelligence control method flow chart of sensitivity and multi-Agent;
Fig. 2 is based on the electric network reactive-load Based Intelligent Control level schematic diagram of sensitivity and multi-Agent;
Fig. 3 is regional reactive power flow chart;
Fig. 4 is regional reactive power flow chart;
Fig. 5 is the geographical winding diagram of Gansu electrical network that embodiment provides;
Fig. 6 is comparison diagram before and after the out-of-limit busbar voltage control in Hexi prefecture;
Fig. 7 is that Dunhuang is to the out-of-limit busbar voltage control of Jiuquan circuit front and back comparison diagram.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment is elaborated.Should be emphasized that following explanation only is exemplary, rather than in order to limit the scope of the invention and to use.
Embodiment 1
Fig. 1 is based on the electric network reactive-load Based Intelligent Control control method flow chart of sensitivity and multi-Agent.As shown in Figure 1, method provided by the invention comprises:
Step 1: the transformer station in the electrical network is divided into Three Estate according to the size of busbar voltage, i.e. highest voltage level transformer station, inferior voltage levels transformer station and low-voltage grade transformer station.
Highest voltage level transformer station is that substation bus bar voltage is more than or equal to the transformer station of first set point, inferior voltage levels transformer station is substation bus bar voltage less than first set point and more than or equal to the transformer station of second set point, low-voltage grade transformer station is that substation bus bar voltage is less than the transformer station of second set point.Wherein, first set point and second set point are set according to the actual electric network situation.As, most of electrical network busbar voltages are divided into 750KV, and therefore 330KV and 110KV can be set at 750KV with first set point, and second set point is set at 330KV.
Step 2: electrical network is divided into several mutually disjoint zones, and described mutually disjoint zone refers to that the highest voltage level transformer station in each zone is different.
Each zone is divided into several mutually disjoint areas, and described mutually disjoint area refers to that inferior voltage levels transformer station and the low-voltage grade transformer station in each area is different.
Step 3: in grid dispatching center, for each zone arranges a region class Agent, for each area arranges a local level Agent, arrange one in addition and coordinate level Agent.
Fig. 2 is electric network reactive-load intelligence control system level schematic diagram, as shown in Figure 2, region class Agent is used for judging whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, and when the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, the adjustable reactive-load compensation equipment that adjustable reactive-load compensation equipment and time voltage levels transformer station of highest voltage level transformer station configuration in the zone disposes is carried out reactive power.
Local level Agent is used for judging whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, and when the busbar voltage of time voltage levels transformer station is out-of-limit in the area, the adjustable reactive-load compensation equipment that adjustable reactive-load compensation equipment and the low-voltage grade transformer station of in the area voltage levels transformer station configuration disposes is carried out reactive power.
Coordinate level Agent and be used for the out-of-limit information of voltage that receiving area level Agent sends, and ask to send electric out-of-limit information region class Agent in addition and carry out reactive power.
Step 4: the basic data that region class Agent and local level Agent gather according to the control centre, zoning line voltage/idle sensitivity matrix and area power grid voltage/idle sensitivity matrix respectively.
Voltage/idle the sensitivity matrix that calculates electrical network has a lot of means, method commonly used is, read quiet, the dynamic data information of electrical network of electrical network from the EMS system, then processing is screened and proofreaied and correct to the information that reads, generate and be used for the basic data that trend is calculated, the last voltage/idle sensitivity matrix S that calculates the whole network according to basic data.
Wherein, the concrete computational process of the voltage of the whole network/idle sensitivity matrix S is: setting up departments altogether has n node, comprising n
PqIndividual PQ node, n
PvIndividual PV node and 1 balance node, then the polar form of system load flow equation is:
In the formula (1), P
iAnd Q
iBe respectively active power and reactive power that node injects, V
iBe the voltage magnitude of node i, θ
IjBe the phase angle difference between node i and the node j, G
IjAnd B
IjBe respectively node admittance matrix element Y
IjReal part and imaginary part, N represents the node set that directly links to each other with node i.
Following formula can be obtained in the linearisation of balance point place:
In the formula (2), Δ P and Δ Q are respectively active power variable quantity and the reactive power variable quantity that injects node, and Δ θ and Δ V are respectively the variable quantity of node voltage phase angle and the variable quantity of voltage magnitude, J
P θ, J
Q θ, J
PvAnd J
QvRefer to four matrixs in block form of the Jacobian matrix that P-Q decomposition method (known technology) obtains respectively.
Because voltage magnitude and idle close coupling, with meritorious weak coupling, therefore only consider voltage and idle relation, can make gains merit is changed to 0, and namely Δ P ≡ 0 then can draw by abbreviation
In the formula (3), M is that reactive power is to the sensitivity matrix of voltage magnitude.Make S=M
-1, then have
ΔV=M
-1ΔQ=SΔQ （4）
S is voltage/idle sensitivity matrix, its element S
IjWhen representing the reactive power unit change at node j place, the voltage magnitude variable quantity at node i place.The reactive power compensator that also is node j place in the electrical network injects reactive power to the Sensitirity va1ue of electrical network node j place busbar voltage.
Step 5: local level Agent carries out regional reactive power according to the area power grid voltage/idle sensitivity matrix that calculates.
The busbar voltage of inferior voltage levels transformer station of supposing local level Agent11 location is out-of-limit, and then in conjunction with Fig. 2 and Fig. 3, regional reactive power comprises following substep:
Substep 101: local level Agent11 judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 102; Otherwise, carry out substep 115.
Substep 102: judge whether the out-of-limit inferior voltage levels transformer station of busbar voltage has disposed adjustable reactive-load compensation equipment, if inferior voltage levels transformer station has disposed adjustable reactive-load compensation equipment, then carry out substep 103; Otherwise carry out substep 105.
Substep 103: the adjustable reactive-load compensation equipment of regulating the configuration of this time voltage levels transformer station.
Regulating time voltage levels transformer station reactive power compensator is specially: adopt formula Δ Q=Δ U * S to calculate regulated quantity earlier; Wherein, Δ Q is the reactive power regulated quantity of injecting, and Δ U is the out-of-limit value of busbar voltage, S be inferior voltage levels transformer station under the reactive power compensator to the Sensitirity va1ue of out-of-limit bus, this value is obtained from voltage/idle sensitivity matrix.Then, regulate reactive power compensator according to regulated quantity.
Substep 104: local level Agent11 judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 105; Otherwise, carry out substep 115.
Substep 105: upwards vertically regulate, the region class Agent1 that is local level Agent11 affiliated area judges whether the highest voltage level transformer station in the zone has disposed adjustable reactive-load compensation equipment, if described highest voltage level transformer station has disposed adjustable reactive-load compensation equipment, then carry out substep 106; Otherwise carry out substep 108.
Substep 106: the adjustable reactive-load compensation equipment of regulating this highest voltage level transformer station configuration.
Regulating highest voltage level transformer station reactive power compensator is specially: adopt formula Δ Q=Δ U * S to calculate regulated quantity earlier; Wherein, Δ Q is the reactive power regulated quantity of injecting, and Δ U is the out-of-limit value of busbar voltage, S be highest voltage level transformer station under the reactive power compensator to the Sensitirity va1ue of out-of-limit bus, this value is obtained from voltage/idle sensitivity matrix.Then, regulate reactive power compensator according to regulated quantity.
Substep 107: local level Agent11 judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 108; Otherwise, carry out substep 115.
Substep 108: regulate downwards vertically, namely local level Agent11 is according to regional line voltage/idle sensitivity matrix, with the adjustable reactive-load compensation equipment of all low-voltage grade transformer stations configurations in the area according to the descending rank order of sensitivity.
Substep 109: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment of low-voltage grade transformer station configuration successively, in the area busbar voltage of inferior voltage levels transformer station not out-of-limit till.
Substep 110: local level Agent11 judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 111; Otherwise, carry out substep 115;
Substep 111: lateral adjustments, be the region class Agent1 that local level Agent11 sends to the out-of-limit information of voltage local level Agent11 affiliated area, voltage/idle the sensitivity of the adjustable reactive-load compensation equipment of inferior voltage levels transformer station configuration in other areas in the region class Agent1 zoning beyond the local level Agent11 location, and the adjustable reactive-load compensation equipment that the inferior voltage levels transformer station in other areas is disposed is according to voltage/descending order of idle sensitivity.
As described in Figure 2, in the present embodiment, in fact voltage/idle the sensitivity of inferior voltage levels transformer station configuration in other areas in the region class Agent1 zoning beyond the local level Agent11 location be exactly to calculate voltage/idle sensitivity that the inferior voltage levels transformer station of local level Agent12 and local level Agent13 location disposes.Again with the voltage/idle sensitivity of the inferior voltage levels transformer station configuration of local level Agent12 and local level Agent13 location according to descending rank order.
Substep 112: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment of the inferior voltage levels transformer station configuration of its local level Agent12 and local level Agent13 location successively, till the busbar voltage of the inferior voltage levels transformer station in described local level Agent location is not out-of-limit.
Substep 113: local level Agent11 judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 114; Otherwise, carry out substep 115.
Substep 114: the reactive compensation capacity deficiency, calculate reactive compensation capacity to be configured according to regional line voltage/idle sensitivity matrix.
The computing formula of reactive compensation capacity to be configured is Δ Q=Δ U * S
MLWherein Δ Q is reactive compensation capacity to be configured, and Δ U is the out-of-limit value of bus L voltage, S
MLFor injecting reactive power to the sensitivity of bus L voltage, S in the node M place
MLFrom the REACTIVE POWER sensitivity matrix, obtain.
Substep 115: regional reactive power finishes.
Step 6: region class Agent carries out regional reactive power according to the regional power grid voltage/idle sensitivity matrix that calculates.
The busbar voltage of highest voltage level transformer station of supposing region class Agent1 region is out-of-limit, and then in conjunction with Fig. 2 and Fig. 4, regional reactive power comprises following substep:
Substep 201: region class Agent1 judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 202; Otherwise, carry out substep 212.
Substep 202: judge whether the out-of-limit highest voltage level transformer station of busbar voltage has disposed adjustable reactive-load compensation equipment, if described highest voltage level transformer station has disposed adjustable reactive-load compensation equipment, then carry out substep 203; Otherwise carry out substep 205.
Substep 203: the reactive power compensator of regulating highest voltage level transformer station.Regulative mode is with substep 106.
Substep 204: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 205; Otherwise, carry out substep 212.
Substep 205: regulate downwards vertically, namely region class Agent is according to this regional power grid voltage/idle sensitivity matrix, with the adjustable reactive-load compensation equipment of all times voltage levels transformer stations configuration in the zone according to the descending rank order of sensitivity.
Substep 206: according to the order after the ordering, regulate time adjustable reactive-load compensation equipment of voltage levels transformer station configuration successively, in the zone busbar voltage of highest voltage level transformer station not out-of-limit till.
Substep 207: region class Agent1 judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 208; Otherwise, carry out substep 212.
Substep 208: lateral adjustments, be that region class Agent1 sends to other region classes Agent with the out-of-limit information of voltage by coordinating level Agent, other region classes Agent calculates the voltage/idle sensitivity of the adjustable reactive-load compensation equipment of the highest voltage level transformer station configuration in the zone separately, and with the adjustable reactive-load compensation equipment of the highest voltage level transformer stations configuration in other zones according to voltage/descending order of idle sensitivity.
Substep 209: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment of the highest voltage level transformer station configuration in other zones successively, till the busbar voltage of the highest voltage level transformer station in described region class Agent region is not out-of-limit.
Substep 210: region class Agent1 judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 211; Otherwise, carry out substep 212.
Substep 211: the reactive compensation capacity deficiency, calculate reactive compensation capacity to be configured according to regional power grid voltage/idle sensitivity matrix.The computational methods of reactive compensation capacity to be configured are identical with the reactive compensation capacity computational methods to be configured of record in the substep 114.
Substep 212: regional reactive power finishes.
Below, according to the method described above, be example with the Gansu electrical network, the concrete application of method provided by the invention is described.Fig. 5 is the geographical winding diagram of Gansu electrical network that embodiment provides, as shown in Figure 5, Gansu electrical network highest voltage level 750kV busbar voltage operation allowed band is 750kV-800kV, and Dunhuang and the 750kV of Jiuquan transformer station busbar voltage range of operation that the AVC system is installed are 765kV-785kV; The electrical network time voltage levels major network 330kV 330kV of transformer station busbar voltage operation allowed band in Gansu is 330kV-363kV, and Hexi prefecture 330kV busbar voltage range of operation is 351kV-361kV.
Along with the variation that wind-powered electricity generation is exerted oneself, Hexi prefecture 330kV busbar voltage is prone to out-of-limit, and Gansu major network 330,750kV busbar voltage are normally not present out-of-limit situation.When busbar voltage is out-of-limit, uses method provided by the invention and can make voltage qualified.For example, it is 50% o'clock that the Hexi prefecture wind-powered electricity generation is exerted oneself, there are 10 busbar voltages out-of-limit, after controlling on the spot, out-of-limit busbar voltage improves, (among the figure abscissa be that out-of-limit bus, ordinate are before busbar voltage, the white column-shape strip representative control, black column-shape strip representative control back) as shown in Figure 6 all reaches acceptability limit, and visible local level control strategy is controlled on the spot and can obviously be improved voltage.
When the N-1 fault takes place in the higher circuit of load factor, easily cause the whole network part 330,750kV busbar voltage out-of-limit, carry out reactive power according to the method that the present invention proposes, can make the voltage of out-of-limit bus arrive acceptability limit, further verified tactful validity.For example, 750kV Dunhuang has 8 busbar voltages out-of-limit to Jiuquan circuit N-1 fault, through the control on the spot of local level control and after coordinating control voltage all be improved significantly, as shown in Figure 7.Verified the validity of local level control strategy.
Method provided by the invention helps to improve the transient stability of system.For example, 330kV Yumen, area, Yumen is to the single-phase instantaneous short-circuit ground connection of the Jiayu Pass circuit, after the dynamic reactive compensation device of this Agent control puts into operation, busbar voltage in the transient process is obviously promoted, Yumen 330kV bus rises to 270.60kV by the 248.4.kV in the transient process, Yumen 110kV bus rises to 91.3kV by 82.50kV, prosperous western 330kV bus rises to 283.84kV by 257.43kV, and the transient stability that helps to improve system based on the reactive voltage Intelligent Control Strategy of multi-Agent is described.
Above-mentioned instance analysis shows: this method has overcome the big defective of conventional method amount of calculation by the linear computing method of sensitivity, according to electric pressure each transformer station being defined as regional Agent and regional Agent between service area, Agent itself have autonomy, initiatively, reaction, characteristic such as mutual, the coordination principle of controlling from high to low at sensitivity coefficient solves the difficulty that decentralized coordinating control voltage is difficult to realize, thereby realizes the voltage power-less Based Intelligent Control to whole electrical network.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (4)
1. electric network reactive-load intelligence control method based on sensitivity and multi-Agent is characterized in that described method comprises:
Step 1: the transformer station in the electrical network is divided into Three Estate according to the size of busbar voltage, i.e. highest voltage level transformer station, inferior voltage levels transformer station and low-voltage grade transformer station;
Described highest voltage level transformer station is that substation bus bar voltage is more than or equal to the transformer station of first set point;
Described voltage levels transformer station is substation bus bar voltage less than first set point and more than or equal to the transformer station of second set point;
Described low-voltage grade transformer station is that substation bus bar voltage is less than the transformer station of second set point;
Step 2: electrical network is divided into several mutually disjoint zones, and described mutually disjoint zone refers to that the highest voltage level transformer station in each zone is different;
Each zone is divided into several mutually disjoint areas, and described mutually disjoint area refers to that inferior voltage levels transformer station and the low-voltage grade transformer station in each area is different;
Step 3: in grid dispatching center, for each zone arranges a region class Agent, for each area arranges a local level Agent, arrange one in addition and coordinate level Agent;
Described region class Agent is used for judging whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, and when the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, the adjustable reactive-load compensation equipment that adjustable reactive-load compensation equipment and time voltage levels transformer station of highest voltage level transformer station configuration in the zone disposes is carried out reactive power;
Described local level Agent is used for judging whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, and when the busbar voltage of time voltage levels transformer station is out-of-limit in the area, the adjustable reactive-load compensation equipment that adjustable reactive-load compensation equipment and the low-voltage grade transformer station of in the area voltage levels transformer station configuration disposes is carried out reactive power;
The described level Agent that coordinates is used for the out-of-limit information of voltage that receiving area level Agent sends, and asks to send electric out-of-limit information region class Agent in addition and carry out reactive power;
Step 4: the basic data that region class Agent and local level Agent gather according to the control centre, zoning line voltage/idle sensitivity matrix and area power grid voltage/idle sensitivity matrix respectively;
Step 5: local level Agent carries out regional reactive power according to the area power grid voltage/idle sensitivity matrix that calculates;
Step 6: region class Agent carries out regional reactive power according to the regional power grid voltage/idle sensitivity matrix that calculates.
2. control method according to claim 1 is characterized in that described regional reactive power comprises following substep:
Substep 101: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 102; Otherwise, carry out substep 115;
Substep 102: judge that whether the out-of-limit inferior voltage levels transformer station of busbar voltage has disposed adjustable reactive-load compensation equipment, if described voltage levels transformer station disposed adjustable reactive-load compensation equipment, then carries out substep 103; Otherwise carry out substep 105;
Substep 103: the adjustable reactive-load compensation equipment of regulating described voltage levels transformer station configuration;
Substep 104: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 105; Otherwise, carry out substep 115;
Substep 105: the region class Agent of local level Agent affiliated area judges whether the highest voltage level transformer station in the zone has disposed adjustable reactive-load compensation equipment, if described highest voltage level transformer station has disposed adjustable reactive-load compensation equipment, then carry out substep 106; Otherwise carry out substep 108;
Substep 106: the adjustable reactive-load compensation equipment of regulating the configuration of described highest voltage level transformer station;
Substep 107: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 108; Otherwise, carry out substep 115;
Substep 108: local level Agent is according to regional line voltage/idle sensitivity matrix, with the adjustable reactive-load compensation equipment of all low-voltage grade transformer stations configurations in the area according to the descending rank order of sensitivity;
Substep 109: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment of low-voltage grade transformer station configuration successively, in the area busbar voltage of inferior voltage levels transformer station not out-of-limit till;
Substep 110: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 111; Otherwise, carry out substep 115;
Substep 111: local level Agent sends to the out-of-limit information of voltage the region class Agent of local level Agent affiliated area, voltage/idle the sensitivity of the adjustable reactive-load compensation equipment of inferior voltage levels transformer station configuration in other areas in the region class Agent zoning beyond the described local level Agent location, and the adjustable reactive-load compensation equipment that the inferior voltage levels transformer station in other areas is disposed is according to voltage/descending order of idle sensitivity;
Substep 112: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment that inferior voltage levels transformer station in other areas disposes successively, till the busbar voltage of the inferior voltage levels transformer station in described local level Agent location is not out-of-limit;
Substep 113: local level Agent judges whether the busbar voltage of time voltage levels transformer station in the area is out-of-limit, if the busbar voltage of time voltage levels transformer station is out-of-limit in the area, then carries out substep 114; Otherwise, carry out substep 115;
Substep 114: the reactive compensation capacity deficiency, calculate reactive compensation capacity to be configured according to regional line voltage/idle sensitivity matrix;
Substep 115: regional reactive power finishes.
3. control method according to claim 1 is characterized in that described regional reactive power comprises following substep:
Substep 201: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 202; Otherwise, carry out substep 212;
Substep 202: judge whether the out-of-limit highest voltage level transformer station of busbar voltage has disposed adjustable reactive-load compensation equipment, if described highest voltage level transformer station has disposed adjustable reactive-load compensation equipment, then carry out substep 203; Otherwise carry out substep 205;
Substep 203: the reactive power compensator of regulating highest voltage level transformer station;
Substep 204: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 205; Otherwise, carry out substep 212;
Substep 205: region class Agent is according to this regional power grid voltage/idle sensitivity matrix, with the adjustable reactive-load compensation equipment of all times voltage levels transformer stations configuration in the zone according to the descending rank order of sensitivity;
Substep 206: according to the order after the ordering, regulate time adjustable reactive-load compensation equipment of voltage levels transformer station configuration successively, in the zone busbar voltage of highest voltage level transformer station not out-of-limit till;
Substep 207: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 208; Otherwise, carry out substep 212;
Substep 208: region class Agent sends to other region classes Agent with the out-of-limit information of voltage by coordinating level Agent, other region classes Agent calculates the voltage/idle sensitivity of the adjustable reactive-load compensation equipment of the highest voltage level transformer station configuration in the zone separately, and with the adjustable reactive-load compensation equipment of the highest voltage level transformer stations configuration in other zones according to voltage/descending order of idle sensitivity;
Substep 209: according to the order after the ordering, regulate the adjustable reactive-load compensation equipment of the highest voltage level transformer station configuration in other zones successively, till the busbar voltage of the highest voltage level transformer station in described region class Agent region is not out-of-limit;
Substep 210: region class Agent judges whether the busbar voltage of highest voltage level transformer station in the zone is out-of-limit, if the busbar voltage of highest voltage level transformer station is out-of-limit in the zone, then carries out substep 211; Otherwise, carry out substep 212;
Substep 211: the reactive compensation capacity deficiency, calculate reactive compensation capacity to be configured according to regional power grid voltage/idle sensitivity matrix;
Substep 212: regional reactive power finishes.
4. according to claim 2 or 3 described control methods, it is characterized in that the reactive power compensator of described adjusting highest voltage level transformer station/time voltage levels transformer station/low-voltage grade transformer station is specially:
Substep 301: adopt formula Δ Q=Δ U * S to calculate regulated quantity; Wherein, Δ Q is the reactive power regulated quantity of injecting, and Δ U is the out-of-limit value of busbar voltage, and S is that the affiliated highest voltage level transformer station/time voltage levels transformer station/low-voltage grade transformer station of reactive power compensator is to the REACTIVE POWER Sensitirity va1ue of out-of-limit bus;
Substep 302: regulate reactive power compensator according to regulated quantity.
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